21504054

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{353}}^1$

素因数の和:453

約数の個数: 64

約数和(自身を含む): 51383808

約数和(自身を除く): 29879754

約数列:

[1, 2, 3, 6, 11, 13, 22, 26, 33, 39, 66, 71, 78, 142, 143, 213, 286, 353, 426, 429, 706, 781, 858, 923, 1059, 1562, 1846, 2118, 2343, 2769, 3883, 4589, 4686, 5538, 7766, 9178, 10153, 11649, 13767, 20306, 23298, 25063, 27534, 30459, 50126, 50479, 60918, 75189, 100958, 150378, 151437, 275693, 302874, 325819, 551386, 651638, 827079, 977457, 1654158, 1954914, 3584009, 7168018, 10752027, 21504054]

約数ペア:

[(1, 21504054), (2, 10752027), (3, 7168018), (6, 3584009), (11, 1954914), (13, 1654158), (22, 977457), (26, 827079), (33, 651638), (39, 551386), (66, 325819), (71, 302874), (78, 275693), (142, 151437), (143, 150378), (213, 100958), (286, 75189), (353, 60918), (426, 50479), (429, 50126), (706, 30459), (781, 27534), (858, 25063), (923, 23298), (1059, 20306), (1562, 13767), (1846, 11649), (2118, 10153), (2343, 9178), (2769, 7766), (3883, 5538), (4589, 4686)]